body {
    margin: 0;
    padding: 0;
}
.app_container{
    width: 100vw;
    height: 100vh;
    background-color: white;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
	.main_container{
		display: flex;
		flex: 1;   // 占满 Header 下方所有区域
		height: calc(100vh - 50px); 
		overflow-y: auto;
		.right_container{
			height: 100%;	
			width: 100%;
		}
	}
}